Electrical t connecter



n 1,642,492 A. B. DIBNER v ELECTRICAL T CONNECTER Filed June 17. 1925Eff-- Patented Seat. 13', 1927.v e

UNITED; srarss j PATENT "oFFjIjCE,

Annan-.nr annum nimma; or nnooxrirn; Naw Yonx. I

mennen.

Application menue 17, im. serial, no'. sans.

My invention relates to improvementsvin T connecters for electricalinstallations.'

The present invention'l isa development of the' T connecter forming thesubject matter of my e co-pendin application -for Letters Patent of4 thenited States, No. 703,143, filed March 31,1924.

The invention comprises, briefly, two similar complementaryymembershaving hooked upper ends adapted to'hook over the main horizontalconductor and depending body portions arranged to firmly grip andsupport the usual branch vertical conductors.

Unlike. T connecters now in use, the present invention comprehends twoexactly similar parts which may be assembled tov provide an eiicientform of connecting device for electrical installations of thischaracter.' It

is therefore theJ principal object of the invention to produce a Tconnecter which consists of two parts, similar in construction andinterchangeable in installation.

A further object of the invention is to provide a. T connecter of. thischaracter,

which may be manufactured at a greatly re'- j duced cost. I accomplishthis object by sim-f plifying production, since only one type o fcastingis required in placey of at least three used to produceT'connecters of other types.

" One embodiment of my invention is illustratively exemplified in4 theaccompanyingl drawings, in which Figure 1 is a side elevational View ofthe improved -T cnnecter; Figuref'l2 is an end elevational of the :msame; and Figure?, is a transverseisectional view taken on the line 3--3of Figure 2.

Referring to the. drawings, 10 amil 11 de note, respectively, the two,complementary members, assembled to form the T co 4i "Q-.ach memberthereof having at its upper end a bent over or hook ortion 12, which issub.

l "stantially one half t e overall Width f the member, and whichprojects to a point beyond the vertical center line of the main 4i?conductor A from which it receives its'support.' Depending from the hookortion 12 is/Ja body portion which is provi ed with a semi-circulargroove 13 dis osed at right angles to the 'axis of the hoo ortion 12,and 5" which is adapted to provi e two contact sur-faces about thebranch conductor B, i. e., lone surface for each member jof theconnecter. Ears 14 projecting from, the sldes or ends of the body carrybolts- 15 which, 5 whentightened, grip the head portion of the T to thebranch conductor B.

ecter,

Unlike other types of i12 .and the shorterv connecters, it is l `4unnecessary for the branch conductor B to head portionv ofeach memberlis an arm 19 which s erves the purpose of mechanically lengthening thepoint of support for the branch. conductor B and which is provided wlthside projections 20 carrying bolts 21 cooperating with the projectionsof the other arm to establish a second point at which the T is clamped.to the branch conductor, serving` both mechanical and electricalobeets.

vInstallation of the invention is as follows: l All the bolts beingremoved from each member, or half ofthe T connecter, the ,hook portions12 ,thereof are hooked over theJ main conductor A, so as to suspend 'themembers by -means of thehooks.

ductor B is then placed in one of the grooves 13 and the head of theother member moved intov positlon so as to fix its -groove'13 in contactwith the opposite 4surface of con` ductor B. .The conductor B is thenlin position corresponding to the contactsurfaces provided in the twoarms 19 for gripping it."

The bolts 15, 18 and 21 are thereafter'inserted and tightened.Electrical conductivityv is thereby established between the mainconductor A and the branch conductor B. e

It will beclear that the use of cl ping means instead of shrink fittingor soldering eliminates the necessity for the additional heatingapparatus usually employed for this urpos'e. According to thisinvention, adjustment of the clampingmeans represents -the nal operationand no preliminary work is necessary and a complete operation ofassembly may take place in one location and at one time.

Variations in sizes in and cable conductors make no material dierence'when installations are made with the present T-eonnecter, becauseof the wide Vand conditions tub-A adjustment possible and the amount ofelheient electrical contacting surface between the parts.

For disassembling, the bolts of the connecter need simply to be loosenedand the latter is again available for use. This step is accomplishedWithout the aid of heat for loosening a shrink lit or solder.

By providing a 45 overhang in the head on each side of the mainconductor A, it is possible for the connecter to remain in fullelectrical contact with the main conductor by virtue of gravity andquite irrespective of the grip imposed by the bolts. Similarly, themechanical strains due to the Weight of the suspended conductor B istransmitted mechanically directly to the main conductor A Without havingpreviously to pass through the bolts liso that if these head bolts l5Were to be removed the connecter would continue to function fully.

The conductors being placed outdoors' are subject to vibrations causedby Weather and electro-mechanical shocks imposed on such electricalmachinery. The vibrations set up in this manner have a tendency toconcentrate the strains atpoints of fulcrum. .Repeated strains beyondthe elastic limit will cause crystallization of the conductor andsubsequent failure. To overcome this deect, means are provided,according to the present invention, whereby such strains will bedistributed.

aerienne What I claim is:

l. A T connecter for electric installations comprising similar,interchangeable clamping members, each member having a body and a headportion provided With a hook projection extending beyond the verticalcenter line of said body for freely supporting said members insuspension from a conductor, eachV of said members having a dependingportionV adapted to embrace one halt' of a branch conductor and meansfor adjusting said meinbers to clamp the latter about both conductors.

2. A T connecter, as claimed in claim l, in which the head member isprovided with an integral I-shaped depending member having lateralprojections and adjustable means connecting said lateral projections.

3. A T connecter, as claimed in claim l, in Which the depending memberport-ions are fastened together at spaced points independently of thehead portions of said members.

4. A T connecter, as claimed in claim l, in Which the depending membersare spaced from the branch conductors and provided with opposed, lateralprojections embracing the said branch conductor in superposed, clampingrelation and fastening elements for said lateral projections.

In testimony whereof, I have signed my name to this specication, this"29.day of May, 1925. j

ABRAHAM BERNARD DIBNER.

